What do the Determinants Determine: The Internal Validity of the Rorschach

Summary

To investigate the internal validity of Rorschach profile analysis, a repertory grid technique was used, with 47 undergraduate Ss, to assess relationships between four constructs referring to the ‘determinant’ properties of inkblots, and four constructs referring to their supposed psychological concomitants. The grids were analysed by a computer program COIN, which produces a composite grid, indicating the pattern of construct relationships characteristic of the whole sample. Results indicated a common pattern of construct relationships which was significant over and above individual variations. This pattern, however, was not the one claimed by Rorschach and assumed in conventional profile analysis of Rorschach protocols.